Why not?

I mean, if it works for that society and it's democratically passed, why shouldn't a society do whatever it wants?

Use of the word 'should' makes it sound like there's a moral imperative for us to not help each other. I don't think that's the case, and I think there's a good argument that in future we'll need to consider different types of society that deal with abundance rather than scarcity; for example, with universal living wages.